Add AS2 format to RABL files

app/views/accounts/show.rabl → app/views/accounts/show.activitystreams2.rabl

-extends 'activitypub/types/person.rabl'
+extends 'activitypub/types/person.activitystreams2.rabl'
 
 object @account
 

app/views/activitypub/intransient.rabl → app/views/activitypub/intransient.activitystreams2.rabl

-extends 'activitypub/base.rabl'
+extends 'activitypub/base.activitystreams2.rabl'
 
 node(:id) { request.original_url }

app/views/activitypub/types/person.rabl → app/views/activitypub/types/person.activitystreams2.rabl

-extends 'activitypub/intransient.rabl'
+extends 'activitypub/intransient.activitystreams2.rabl'
 
 node(:type) { 'Person' }